雷达高度表脉冲压缩接收技术

讨论强直达信号干扰下弹载脉压雷达高度表回波信号接收问题。在脉压前设置自动增益控制及限幅电路，根据回波信号电平大小及时延长短，在保证回波信号相位特性的同时，对直达信号进行适当限幅，抑制其电平。在脉压后再设置自动增益控制及限幅电路，进一步抑制直达信号压缩脉冲主瓣电平。该技术可有效提高强直达信号干扰时近距离回波信号的检测灵敏度，使雷达高度表具备0～15km的测高能力。

Receiving Technology of Pulse Compression Radar Altitude Indicator

The receiving methords under the strong interference of the direct signal of pulse compression radar altitude indicator in missile systems are discussed.According to the level and delaytime of the echo signal, a special AGC-limiting circuit before pulse compression is used to control the depth of the direct signalwhile guarantee the phase character of the echo signal. After pulse compression,another AGC-limiting circuit is uses to restrain the mainlobe of the direct signal.This technology can increase the detecting sensitivity of the echo signal with short delaytime under the strong interference of the direct signal,and can ensure the altitude indicating ability of 0 to 15 km.